Arc-lamp generator for producing and amplifying electrical oscillations



'Dec. 14. 1926. 1,610,875

g y E.MAYER' ABC LAMP GENERATOR FOR PRODUCING AND AMPLIFYINGELECTRICAL OSCILLATIONS Filed Dec. 5, 1922 anomtoz EMIL MAYER 92w mew, Q Q

Patented Dec. ld, res

EMIL MAYER, OF BERLIN, GERMAN Y, ASSIGNOR TO GESELLSCHAFT Ftl'R DRAHTLOSE TELEGRAPHIE 1VL B. i-L, OF BERLIN, GERMANY, A CORFORATZON 0F GERMANY.

ARC-LAMP GENERATOR FOR FRODUCING AND AMPLIFYING ELECTRICAL OSCILLATIONS.

Application filed December 5, 1922, Serial No. 605,065, and in Germany December 23, 1921.

An object oi the present invention is to provide an arc-lamp arrangement which performs the functions of a cathode relay.

In accordance with the present invention, an arc-lamp is used in which, as in well known arrangements, one of the electrodes is constructed of metal and is cooled by water. :lowcver, unlike previous arrangements, the negative characteristic of the arc is not used for generating oscillations by means of an oscillating circuit in parallel connection with the electrodes of the arc, but an incombustible diaphragm is provided in the path of the arc, i. e. between the two electrodes. This diaphragm is used. as a controlling element by means of which the current of the arc may be varied in a manner similar to the variation of the current in the output circuit of a cathode relay by its grid.

The diaphragm is composed of metal alloy, properly cooled and has one or a pluralityof apertures in the path of the arc. By means of this diaphragm the arc may be controlled in accordance with the well known method or" controlling cathode tubes by their grids either by applying a potential between the cathode and the diaphragm or by a magnetic field afiecting this part of the arc.

This arrangement is adapted for high trequency amplification or for generating oscillations.

Let us assume that a high frequency potential of suflicient amplitude is impressed on the cathode and the diaphragm. This same frequency but at an increased amplitude will occur between the cathode and anode. However, in the same manner as with tubes a closed oscillating circuit may be provided between the cathode and the anode and trom'this circuit high frequency potential may be supplied to the diaphragm (outside energization, auto-energization). It the diaphragm is actuated by a magnetic field instead of a potential then this may be also used in the same manner for controlling the arc.

For the purpose of more readily defining the are, auxiliary igniting arrangements may be used in a manner well known in the art or controlled extinguishing sparks.

The single figure of the drawing represents an embodiment of the invention in a circuit arrangement.

As shown, 1, 2 are the solid electrodes of an arc generator which in series with choke code 3, 4t is connected with the current source. The are is connected inparallel with a tuning coil 5 and a tuning condenser (S. 7 is the primary coil or" a transformer which induces current in the coil 8. The coil 8 is connected through a condenser 9 .On one hand with the negative electrode 2 of the are and on the other hand with the diaphragm 10. The diaphragm 10 which in the well known manner is kept at a low temperature by means of cooling, constitutes the controlling element or grid. Obviously, the coils 7 and 8 may be combined in a single coil or some other well known backcoupling circuit may be used.

Having described myinvention, what I claim is:

1. In a device of the character described, an arc lamp having an anode and a solid cathode, both of said electrodes being exposed to the air, and a control electrode for controllingthe passage of current between said anode and cathode. j V

2. In a device of the character described, an arc lamp having an anode and a solid cathode, both of said electrodes being exposed to the air, and a grid for controlling the passage of current between said anode and cathode.

In a device of the character described, an arc lamp having an anode and a solid cathode, both of said electrodes being exposed to the air, and a grid in the current path between said anode and cathode for controlling the current flow between said anode and cathode.

4i. In an electric system, a device comprising an arc lamp having an anode and a solid cathode, both of said electrodes being exposed to the air, and a control electrode for controlling the passage of current between said anode and cathode, an outputand an input circuit for said device, means for regeneratively coupling said circuits together, and means for maintaining the arc.

5. In an electric system, a device comprising an arc lamp having an anode and a solid cathode both of said electrodes being ex posed to the air, and a control electrode for controlling the passage of current between said anode and cathode, a first circuit connecting said anode and cathode, a second circuit connecting said control electrode and cathode means for regenerativeiy coupling said circuits together, and means for maintaining the arc.

EMIL MAYER. 

